General
Eaton provides extra protection during refusing
and switching operations when used in series
with isolation links from its Cooper Power™ series
Bay-O-Net type fuse or its Cooper Power series
MagneX™ interrupter.
Isolation links are not fuses and do not have an
interrupting rating. During a transformer failure,
the isolation link will melt so that the opened
primary circuit of a faulted transformer cannot be
re-energized by the line crew.
Applications
Bay-O-Net assemblies
Isolation links are used in series with Eaton's
Cooper Power series Bay-O-Net type expulsion
fuses to provide extra protection during re-fusing
operations. They are coordinated to operate at
high current levels that are typical of a transformer
failure.
MagneX interrupter
Isolation links are also used in series with the
MagneX interrupter to provide extra protection
during switching operations. The MagneX
interrupter isolation link has arc shortening tabs
to reduce the arc length and thus reduce the
I
2
t energy released during operation. They are
coordinated to operate at high current levels that
are typical of a transformer failure.
Installation
No special tools are required. Isolation links
are bolted onto Bay-O-Net fuse assemblies or
MagneX interrupters in series between the
primary transformer bushing and primary coil.
Refer to Service Information MN132003EN
Sidewall-Mounted and Cover-Mounted Bay-O-
Net Fuse Assembly Installation Instructions and
MN132004EN (S240-34-1) Single-Phase MagneX
Interrupter Installation Instructions for details.
Ordering information
To order Eaton's Cooper Power series isolation
link, first refer to Catalog Data CA132009EN
(current sensing), CA132010EN (dual sensing),
CA132011EN (dual element), or CA132007EN (high
ampere overload) for details on corresponding
Bay-O-Net fuses, or Catalog CA132016EN for
details on MagneX interrupter elements. For the
fuse elements, use Table 1 to cross reference the
isolation link required. For the MagneX interrupter
elements, use Table 2 to cross-reference the
appropriate element.
Isolation link
Fusing Equipment
Catalog Data
CA132012EN
Effective February 2015
Supersedes 240-47 May 2010
